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18650 Lithium Battery Capacity Automatic Charge Discharge Internal Resistance Tester

18650 Lithium Battery Capacity Automatic Charge Discharge Internal Resistance Tester

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1. Working power supply: DC5V external power supply or 18650 battery (both need to be prepared by yourself)2. Applicable batteries:... Read more

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    Description


    1. Working power supply: DC5V external power supply or 18650 battery (both need to be prepared by yourself)
    2. Applicable batteries: batteries that meet the stop discharge voltage of 2.5~3.5V and 4.2V charging are applicable
    3. Power supply interface: Type-C interface, power supply line is prepared by yourself (C port mobile phone line)
    4. System language: Chinese, English
    5. Test quantity: 1-way charging and discharging measurement (only right battery)
    6. Internal resistance measurement: Support, use DC two-wire method to test internal resistance
    7. Charging function: Support, 1-way program control about 1A (MAX) charging; 1-way hardware control about 0.5A (MAX) charging
    8. Discharging function: Support, only 1-way supports about 1A (MAX) discharge and automatically stops when the condition is met
    9. Automatic charging and discharging: Support, the battery is fully charged at the end of automatic mode (stop voltage is set to 2.8V or above)
    10. Cyclic charging and discharging: Support, 1~9 cycles adjustable
    11. Status prompt: Supported
    12. Stop discharge voltage: 2.5V, 2.6V, 2.7V, 2.8V, 2.9V, 3.0V, 3.1V, 3.2V, 3.3V, 3.4V, 3.5V, 11 levels adjustable
    13. Discharge current: two resistors, about 1A current (MAX), not adjustable, does not support self-modification
    14. Charging voltage: controlled by dedicated battery charging chip, about 0.5A/1A charging (MAC), full charge voltage 4.2V
    15. Power off save: only save the setting parameters, not the measurement data
    16. Weight: 80g
    17. Product size: 110×88x30mm

    Test method:
    Wait a few seconds after installing the battery, read the battery data, and the battery voltage and internal resistance parameters will be displayed. There will be a delay in data loading during the battery loading and unloading process. Check after the data stabilizes

    About capacity test:
    The discharge must be completed to measure the capacity. I have never met anyone who wants to measure the capacity just by installing the battery. Discharge takes time. You have to wait for the discharge to end automatically to have a complete capacity in the discharge stage

    This product uses the DC two-wire method to test the battery internal resistance principle:
    DC impedance is based on the physical formula R=V/I, the test set The battery is forced to pass a large constant DC current (currently 10A-80A is generally used) in a short period of time (usually 2-3 seconds), and the voltage at both ends of the battery is measured, and the current battery internal resistance is calculated according to the formula. The DC two-wire test internal resistance is the result of the middle line resistance, and the result is used for reference comparison between batteries tested in the same batch. Due to the influence of contact resistance and battery self-loss, the internal resistance may not be identified normally and cannot be measured. For those with high requirements for internal resistance measurement accuracy, the TS235 internal resistance tester (AC four-wire method) can be used for internal resistance testing.


    Specification:
    Package Weight
    One Package Weight 0.12kgs / 0.27lb
    One Package Size 16cm * 11cm * 5cm / 6.3inch * 4.33inch * 1.97inch
    Qty per Carton 54
    Carton Weight 7.60kgs / 16.75lb
    Carton Size 50cm * 35cm * 32cm / 19.69inch * 13.78inch * 12.6inch
    Loading Container 20GP: 476 cartons * 54 pcs = 25704 pcs
    40HQ: 1105 cartons * 54 pcs = 59670 pcs

    Specifications

    • Product Assurance: Quality Standards.

    Pros and cons

    • Sustainably produced
    • Ideal for everyday use
    • Compatible replacements
    • Generic aftermarket spare parts
    • We take compliance very seriously & want to ensure full transparency in how our products are presented.
    • Generic / compatible spare parts
    • Not designed to bypass any protection systems
    • Disclaimer: All products are third-party compatible & not affiliated with any original brand. Compatible & Generic Products (Unless Specified)
    • Not manufactured endorsed or affiliated with any original brand owners.

    Returns & Delivery

    When will my order be delivered?

    At Mira Sales, we provide accurate delivery estimates based on your address and the chosen carrier. To view your expected delivery date, please add the product to your cart—your exact options will appear instantly.

    How are delivery times calculated?

    We work with multiple trusted carriers. Delivery estimates are based on:

    • Your shipping address
    • Carrier availability in your region
    • The shipping service you select (standard, express, priority, etc.)

    Processing time, usually 1–2 business days

    Customs clearance for international orders (if applicable)

    Our system automatically shows you the best estimated arrival date before checkout.

    Do you offer tracking?

    Yes. Every order includes a tracking number once it is dispatched. You’ll receive it automatically via email or SMS (if provided). Tracking updates allow you to see each step of your order’s journey.

    Can I return my product?

    Yes, you can return your product. At Mira Sales, we want you to feel confident and satisfied with your purchase. If an item arrives damaged, faulty, or not as described, we will happily offer a replacement or refund. Contact our support team via support@mirasales.com

    To speed up resolutions, we kindly request that you provide photo or video evidence of the issue.

    What can I do if my item (or part of it) is damaged?

    At Mira Sales, we want every order to arrive in perfect condition. If your item—or any part of it—arrives damaged, we will resolve the issue quickly and fairly.

    Eligibility for Returns

    You may request a return if:

    • The product arrives damaged, defective, or not working
    • You receive the wrong item
    • The item is not as described on our website

    To process your return quickly, we may ask for a photo or video showing the issue.

    Do I Need to Return the Item?

    In most cases, you will not need to return the damaged item, especially when photo/video proof is sufficient.

    If a return is required, Mira Sales will provide clear instructions and, when applicable, a prepaid return label.

    We’re Here to Help

    Our goal is to resolve all damage-related issues quickly, fairly, and with minimal inconvenience to you.

    You may contact us anytime at: support@mirasales.com

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